package com.ruoyi.web.controller.common;

import cn.hutool.captcha.AbstractCaptcha;
import cn.hutool.captcha.generator.CodeGenerator;
import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.IdUtil;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.enums.CaptchaType;
import com.ruoyi.common.utils.RedisUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.reflect.ReflectUtils;
import com.ruoyi.common.utils.spring.SpringUtils;
import com.ruoyi.framework.config.properties.CaptchaProperties;
import com.ruoyi.system.service.ISysConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * 验证码操作处理
 *
 * @author ruoyi
 */
@RestController
public class CaptchaController{

    @Autowired
    private CaptchaProperties captchaProperties;

    @Autowired
    private ISysConfigService configService;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public AjaxResult getCode() throws NumberFormatException{
        Map<String, Object> ajax = new HashMap<>();
        boolean captchaOnOff = configService.selectCaptchaOnOff();
        ajax.put("captchaOnOff", captchaOnOff);
        if (!captchaOnOff) {
            return AjaxResult.success(ajax);
        }
        // 保存验证码信息
        String uuid = IdUtil.simpleUUID();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;

        // 生成验证码
//		CaptchaType captchaType = captchaProperties.getType();
//		boolean isMath = CaptchaType.MATH == captchaType;
//		Integer length = isMath ? captchaProperties.getNumberLength() : captchaProperties.getCharLength();

        // 生成验证码
        String type = configService.selectConfigByKey("sys.captcha.type").trim().toUpperCase();
        CaptchaType captchaType;
        String len = configService.selectConfigByKey("sys.captcha.length").trim();
        int length;
        if (type.equals("MATH")){
            length = !len.equals("") ?  Integer.parseInt(len) : captchaProperties.getNumberLength();
            captchaType = CaptchaType.MATH;
        }else{
            length = !len.equals("") ? Integer.parseInt(len) : captchaProperties.getCharLength();
            captchaType = CaptchaType.CHAR;
        }


        CodeGenerator codeGenerator = ReflectUtils.newInstance(captchaType.getClazz(), length);
        AbstractCaptcha captcha = SpringUtils.getBean(captchaProperties.getCategory().getClazz());
        captcha.setGenerator(codeGenerator);
        captcha.createCode();

//		String code = isMath ? getCodeResult(captcha.getCode()) : captcha.getCode();
        String code = type.equals("MATH") ? getCodeResult(captcha.getCode()) : captcha.getCode();

        RedisUtils.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        ajax.put("uuid", uuid);
        ajax.put("img", captcha.getImageBase64());
        return AjaxResult.success(ajax);
    }

    private String getCodeResult(String capStr)  throws NumberFormatException{
        //int numberLength = captchaProperties.getNumberLength();
        String length = configService.selectConfigByKey("sys.captcha.length").trim();
        int numberLength = !length.equals("") ?  Integer.parseInt(length) : captchaProperties.getNumberLength();

        int a = Convert.toInt(StringUtils.substring(capStr, 0, numberLength).trim());
        char operator = capStr.charAt(numberLength);
        int b = Convert.toInt(StringUtils.substring(capStr, numberLength + 1, numberLength + 1 + numberLength).trim());
        switch (operator) {
            case '*':
                return Convert.toStr(a * b);
            case '+':
                return Convert.toStr(a + b);
            case '-':
                return Convert.toStr(a - b);
            default:
                return StringUtils.EMPTY;
        }
    }

}
